chore(deps): update rust crate indexmap to v2.7.1

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
indexmap	workspace.dependencies	minor	2.6.0 -> 2.7.1

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Release Notes

indexmap-rs/indexmap (indexmap)

v2.7.1

Compare Source

• Added #[track_caller] to functions that may panic.
• Improved memory reservation for insert_entry.

v2.7.0

Compare Source

• Added methods Entry::insert_entry and VacantEntry::insert_entry, returning
  an OccupiedEntry after insertion.

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